Grinding-machine.



No. 73,223. Patented Apr 30, l90l. L. A. noav & w. c. sauce.

snmnms MACHINE.

(No M d L) pplication filed Dec. 21, 1899.)

2 Sheets-sheaf! Witnesses In vendor:

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mr. uonms Pmns co., :mcmzumoq msoquavoa. 9. c1 7 No. 673,223. PatentedApr. 30,1901.

' L. A. RUBY &. w. c. sauce.

GRINDING MACHINE. (N M d (ApplicationfiledDec.21,1899.)

o o a I 2 Sheets-Sheet 2.

UNITED STATES PATENT OFFICE.

LUTHERA. ROBY, OF CLEVELAND, AND WILLIAM C. BRUCE, OF CHAGRIN FALLS,OHIO, ASSIGNORS TO THE FERROSTEEL COMPANY, OF CLEVE- LAND, OHIO.

GRINDING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 673,223, dated April30, 1901.

Application filed December 21,1899. EerialNo. 741,081. (No model.)

To aZZ whom it may concern:

Be it known that we, LUTHER A. ROBY, residing at Cleveland, and WILLIAMC. BRUCE, residing at Chagrin Falls, in the county of Ouyahoga and Stateof Ohio, citizens of the United States, have invented a new and usefulImprovement in Grinding-Machines, of which the following is aspecification, the principle of the invention being herein exxo plainedand the best mode in which we have contemplated applying that principle,so as to distinguish it from other inventions.

0 ur invention relates to machines for grind ing the lateral inclinedsurfaces of sad-irons;

and it consists of means hereinafter fully described.

The annexed drawings and the following description set forth in detailcertain mechanism embodying the invention, such diszo closed meansconstituting but one of various mechanical forms in which the principleof the invention may be used.

In said annexed drawings, Figure I represents a partial longitudinalcentral section of our invention, taken upon line 1 1, Fig. II, saidlatter figure representing a top plan of the right-hand end of thedevice illustrated in Fig. I. Fig. III represents a partial axialsection of the slide and sad-iron-gripping device. I V

A driving-shaftA is mounted in a bearing 11, secured to the frame B ofthe machine, and has a worm O secured thereto, which engages a wheel D,slidably mounted upon a second shaft E by means of a groove and feather.

Said shaft Eis mounted at one end in a bearing e and has rotativelysecured to the opposite end one member of a suitable clutch F. The wheelD and bearing 6 are held relatively 4o stationary in the direction ofthe axis of shaft E by means of an angle-piece e and groove 61, Fig. I.A third shaft, G, having its axis coincident with that of shaft E, hassecured upon the end adjacent to the above-mentioned 5 clutch member thesecond member of the clutch F and is mounted in a bearing h, formed in ahanger h, depending from a slide J, mounted in suitable ways formed uponthe frame or bed-plate of the machine. A spindle K is mounted insuitable bearings in standards K, bolted to the machine-frame,

as shown in Fig. I. Upon one end of said spindle K is mounted a chuck L,which secures an annular grinding-ring M, having a plaingrinding-surface m, perpendicular to the axis of spindle K.

Upon the slide J is formed or secured a bearing j, inclined to saidgrinding-surface m, in which bearing is journaled a spindle N, whoseaxis of rotation is hence also inclined to said grinding-surface. I

Upon the upper surface of the bearingj is mounted a sad-iron-clampingdevice rotatively secured to spindle N by means of a groove and feather,Fig. III. Said device consists of'two members, an upper member at and alower member 12, each formed with a clamping-surface n oppositelylocated, as shown in Fig. III. The upper member at is formed with acircumferential groove n which engages an angle-piece 12 secured to thehub of a hand-wheel 0, having screw-thread engagement with the upper endof spindle N, as shown in Fig. III, the said hand-wheel therebyrotatively engaging the upper member of said gripping device, wherebysaid hand-wheel and upper member are rotatively engaged, but fixedrelatively to each other in the direction of the spindle-axis, so thatthe upper member may be caused to approach or retract from the lower byturning the said hand-wheel.

Upon the lower end of spindle N is secured a bevel-gear I which mesheswith a second bevel-gear P, secured to the adjacent end of shaft G, asshown in Fig. I.

A hand-wheel J upon a screw j, suitably mounted, permits the slide J tobe advanced toward or retracted from-the grinding-surface m.

.Two collars p and p are secured one in each side of the bearing in thehanger h, and suitable means are employed to cause the two shafts E andG to be rotatively independent of each other during the nonzengagementof the clutch members, but fixed relatively to each other in thedirection of their common axis.

Suitable lever mechanism is provided to thro the two clutch members intoand out of engagement.

The axis of the spindle N is located in a plane without theperpendicular plane passclamped between the clamping-surface of theclamping-device may be revolved about the axis of spindle N in thevicinity of the annular grinding-surface of the grinding-wheel, as shownin Fig. II. Upon the upper end of the spindle Nis secured a hand-wheelN, as'shown in Figs. I and III.

In operating the machine the upper and mitted from the driving-shaft tothe spindle N,which by the nature of the gearingis caused to slowlyrotate, causing the clamping device and the sad-iron to revolve. Byadvancing the slide toward the grinding-wheel one side of the sad-ironmay be brought into contact with the grinding-surface and ground, suchground surface having an inclination to the sad-iron axis'equal to theinclination of the spindle N to the grinding-surface m. One side havingbeen ground, the sad-iron'is released, reversed, and the opposite sidesubmitted to the above-described operation.

When it is desired to operate the machine without the use of theautomatic mechanism for revolving the sad-iron, the clutch is thrown outof gear and the revolving movement imparted by the use of the hand-wheelN, such hand operation sometimes being convenient in the grindingprocess.

Other modes of applying the principle of our invention may be employedinstead of the one explained, change being made as regards the mechanismherein disclosed, provided the means covered by any one of the followingclaims be employed.

We therefore particularly point out and distinctly claim as ourinvention- 1. The combination of a grinding-wheel having a planegrinding-surface, a cross-slide having a rigid inclined bearing, aspindle mounted in said bearing, a rotatablegripping device for grippingsad-irons, the axis of rotation of said gripping device being inclinedto the said grinding-surface, and means for'rotating said device,substantially as set forth.

'2. The combination of a grinding-wheel having a plane grinding-surface,an inclined bearing, a spindle' nounted in said bearing and normallyinclined with respect to the grinding-wheel, a rotatable gripping devicesurrounding the spindle intermediate its length for gripping sad-irons,the axis of rotation of said gripping device inclined to the saidgrinding-surface and Without a plane parallel with it and passingthrough the grinding-wheel axis, and means for rotating said device,substantially as set forth.

3. The combination ofa cross-slide, agrinding-wheel, means for advancingsaid slide toward 'and retracting it from said wheel, a spindle mountedin a bearing. secured. to said slide, a sad-iron-gripping devicefeathered on said spindle, ahand-wheel-having screwthread engagementwith said spindle and rotatively engaging said gripping device'wherebythe latter and said hand-wheel are caused to remain relatively fixedin-the direction of the spindle-axis, and suitable means for rotatin gsaid spindle whereby said gripping device may be rotated,substantiallyas set forth.

4. The combination of a cross-slide, a grinding-wheel, means foradvancing said slide tovward and retracting it from said wheel, a

spindle mounted in a bearing. secured to said cross-slide, a sad irongripping device secured to said spindle, means-for automaticallyrotating the spindle and hand-wheel connected therewith, driving meansand clutch mechanism connecting said driving means and spindle-rotatingmeans, whereby said driving means may be thrown out of gear and thespindle rotated bysaid hand-wheel, substantially as set forth.

Signed by us this 30thday of September,

LUTHER A. ROBY. WILLIAM C. BRUCE. Attest:

D T. DAVIES, A. E. MERKEL.

